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<a class="jxr_linenumber" name="1" href="#1">1</a>   <em class="jxr_comment">/*</em>
<a class="jxr_linenumber" name="2" href="#2">2</a>   <em class="jxr_comment"> * Copyright 2012 The Netty Project</em>
<a class="jxr_linenumber" name="3" href="#3">3</a>   <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="4" href="#4">4</a>   <em class="jxr_comment"> * The Netty Project licenses this file to you under the Apache License,</em>
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<a class="jxr_linenumber" name="6" href="#6">6</a>   <em class="jxr_comment"> * with the License. You may obtain a copy of the License at:</em>
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<a class="jxr_linenumber" name="9" href="#9">9</a>   <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="10" href="#10">10</a>  <em class="jxr_comment"> * Unless required by applicable law or agreed to in writing, software</em>
<a class="jxr_linenumber" name="11" href="#11">11</a>  <em class="jxr_comment"> * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT</em>
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<a class="jxr_linenumber" name="16" href="#16">16</a>  <em class="jxr_comment">/*</em>
<a class="jxr_linenumber" name="17" href="#17">17</a>  <em class="jxr_comment">Copyright (c) 2000,2001,2002,2003 ymnk, JCraft,Inc. All rights reserved.</em>
<a class="jxr_linenumber" name="18" href="#18">18</a>  
<a class="jxr_linenumber" name="19" href="#19">19</a>  <em class="jxr_comment">Redistribution and use in source and binary forms, with or without</em>
<a class="jxr_linenumber" name="20" href="#20">20</a>  <em class="jxr_comment">modification, are permitted provided that the following conditions are met:</em>
<a class="jxr_linenumber" name="21" href="#21">21</a>  
<a class="jxr_linenumber" name="22" href="#22">22</a>  <em class="jxr_comment">  1. Redistributions of source code must retain the above copyright notice,</em>
<a class="jxr_linenumber" name="23" href="#23">23</a>  <em class="jxr_comment">     this list of conditions and the following disclaimer.</em>
<a class="jxr_linenumber" name="24" href="#24">24</a>  
<a class="jxr_linenumber" name="25" href="#25">25</a>  <em class="jxr_comment">  2. Redistributions in binary form must reproduce the above copyright</em>
<a class="jxr_linenumber" name="26" href="#26">26</a>  <em class="jxr_comment">     notice, this list of conditions and the following disclaimer in</em>
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<a class="jxr_linenumber" name="28" href="#28">28</a>  
<a class="jxr_linenumber" name="29" href="#29">29</a>  <em class="jxr_comment">  3. The names of the authors may not be used to endorse or promote products</em>
<a class="jxr_linenumber" name="30" href="#30">30</a>  <em class="jxr_comment">     derived from this software without specific prior written permission.</em>
<a class="jxr_linenumber" name="31" href="#31">31</a>  
<a class="jxr_linenumber" name="32" href="#32">32</a>  <em class="jxr_comment">THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,</em>
<a class="jxr_linenumber" name="33" href="#33">33</a>  <em class="jxr_comment">INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND</em>
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<a class="jxr_linenumber" name="35" href="#35">35</a>  <em class="jxr_comment">INC. OR ANY CONTRIBUTORS TO THIS SOFTWARE BE LIABLE FOR ANY DIRECT, INDIRECT,</em>
<a class="jxr_linenumber" name="36" href="#36">36</a>  <em class="jxr_comment">INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT</em>
<a class="jxr_linenumber" name="37" href="#37">37</a>  <em class="jxr_comment">LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,</em>
<a class="jxr_linenumber" name="38" href="#38">38</a>  <em class="jxr_comment">OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF</em>
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<a class="jxr_linenumber" name="41" href="#41">41</a>  <em class="jxr_comment">EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.</em>
<a class="jxr_linenumber" name="42" href="#42">42</a>  <em class="jxr_comment"> */</em>
<a class="jxr_linenumber" name="43" href="#43">43</a>  <em class="jxr_comment">/*</em>
<a class="jxr_linenumber" name="44" href="#44">44</a>  <em class="jxr_comment"> * This program is based on zlib-1.1.3, so all credit should go authors</em>
<a class="jxr_linenumber" name="45" href="#45">45</a>  <em class="jxr_comment"> * Jean-loup Gailly(jloup@gzip.org) and Mark Adler(madler@alumni.caltech.edu)</em>
<a class="jxr_linenumber" name="46" href="#46">46</a>  <em class="jxr_comment"> * and contributors of zlib.</em>
<a class="jxr_linenumber" name="47" href="#47">47</a>  <em class="jxr_comment"> */</em>
<a class="jxr_linenumber" name="48" href="#48">48</a>  <strong class="jxr_keyword">package</strong> org.jboss.netty.util.internal.jzlib;
<a class="jxr_linenumber" name="49" href="#49">49</a>  
<a class="jxr_linenumber" name="50" href="#50">50</a>  <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">class</strong> CRC32 {
<a class="jxr_linenumber" name="51" href="#51">51</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong>[] TABLE = {
<a class="jxr_linenumber" name="52" href="#52">52</a>          0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3,
<a class="jxr_linenumber" name="53" href="#53">53</a>          0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988, 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91,
<a class="jxr_linenumber" name="54" href="#54">54</a>          0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
<a class="jxr_linenumber" name="55" href="#55">55</a>          0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5,
<a class="jxr_linenumber" name="56" href="#56">56</a>          0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172, 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,
<a class="jxr_linenumber" name="57" href="#57">57</a>          0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
<a class="jxr_linenumber" name="58" href="#58">58</a>          0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f,
<a class="jxr_linenumber" name="59" href="#59">59</a>          0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924, 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d,
<a class="jxr_linenumber" name="60" href="#60">60</a>          0x76dc4190, 0x01db7106, 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
<a class="jxr_linenumber" name="61" href="#61">61</a>          0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01,
<a class="jxr_linenumber" name="62" href="#62">62</a>          0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457,
<a class="jxr_linenumber" name="63" href="#63">63</a>          0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
<a class="jxr_linenumber" name="64" href="#64">64</a>          0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb,
<a class="jxr_linenumber" name="65" href="#65">65</a>          0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0, 0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9,
<a class="jxr_linenumber" name="66" href="#66">66</a>          0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
<a class="jxr_linenumber" name="67" href="#67">67</a>          0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad,
<a class="jxr_linenumber" name="68" href="#68">68</a>          0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a, 0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683,
<a class="jxr_linenumber" name="69" href="#69">69</a>          0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
<a class="jxr_linenumber" name="70" href="#70">70</a>          0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb, 0x196c3671, 0x6e6b06e7,
<a class="jxr_linenumber" name="71" href="#71">71</a>          0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc, 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5,
<a class="jxr_linenumber" name="72" href="#72">72</a>          0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
<a class="jxr_linenumber" name="73" href="#73">73</a>          0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79,
<a class="jxr_linenumber" name="74" href="#74">74</a>          0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236, 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f,
<a class="jxr_linenumber" name="75" href="#75">75</a>          0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
<a class="jxr_linenumber" name="76" href="#76">76</a>          0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713,
<a class="jxr_linenumber" name="77" href="#77">77</a>          0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, 0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21,
<a class="jxr_linenumber" name="78" href="#78">78</a>          0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
<a class="jxr_linenumber" name="79" href="#79">79</a>          0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45,
<a class="jxr_linenumber" name="80" href="#80">80</a>          0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2, 0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db,
<a class="jxr_linenumber" name="81" href="#81">81</a>          0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
<a class="jxr_linenumber" name="82" href="#82">82</a>          0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf,
<a class="jxr_linenumber" name="83" href="#83">83</a>          0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94, 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d,
<a class="jxr_linenumber" name="84" href="#84">84</a>      };
<a class="jxr_linenumber" name="85" href="#85">85</a>  
<a class="jxr_linenumber" name="86" href="#86">86</a>      <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">int</strong> crc32(<strong class="jxr_keyword">int</strong> crc32, byte[] buf, <strong class="jxr_keyword">int</strong> index, <strong class="jxr_keyword">int</strong> len) {
<a class="jxr_linenumber" name="87" href="#87">87</a>          <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> endIndex = index + len;
<a class="jxr_linenumber" name="88" href="#88">88</a>          crc32 ^= 0xffffffff;
<a class="jxr_linenumber" name="89" href="#89">89</a>          <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> i = index; i &lt; endIndex; i ++) {
<a class="jxr_linenumber" name="90" href="#90">90</a>              crc32 = crc32 &gt;&gt;&gt; 8 ^ TABLE[(crc32 ^ buf[i]) &amp; 0xff];
<a class="jxr_linenumber" name="91" href="#91">91</a>          }
<a class="jxr_linenumber" name="92" href="#92">92</a>          crc32 ^= 0xffffffff;
<a class="jxr_linenumber" name="93" href="#93">93</a>          <strong class="jxr_keyword">return</strong> crc32;
<a class="jxr_linenumber" name="94" href="#94">94</a>      }
<a class="jxr_linenumber" name="95" href="#95">95</a>  
<a class="jxr_linenumber" name="96" href="#96">96</a>      <strong class="jxr_keyword">private</strong> CRC32() {
<a class="jxr_linenumber" name="97" href="#97">97</a>          <em class="jxr_comment">// Utility class</em>
<a class="jxr_linenumber" name="98" href="#98">98</a>      }
<a class="jxr_linenumber" name="99" href="#99">99</a>  }
</pre>
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